About 330 people, including relatives of Korean victims of the bombing, as well as Korean students joined the event held at a Korean cenotaph in the Hiroshima Peace Memorial Park, Efe news quoted an epa journalist as reporting.
During the 30-minute event, the participants prayed, read out mourning passages and offered flowers at the cenotaph.
The ceremony precedes Sunday's main commemoration which marks the August 6, 1945, nuclear attack on Hiroshima. The initial blast killed almost 90,000 people, including several thousand Koreans, and destroyed most of the city.
The US dropped a second nuclear bomb on the southern Japanese city of Nagasaki on August 9, killing at least 40,000 people.
The bombings came days before Japan's surrender on August 15, which brought an end to the Second World War.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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